Of course! In order to increase or decrease the number of cases in your monthly subscription, simply log in to your customer account. When you first log in, you should be directed to your "Purchase History" page or you can click on the "Account" icon in the upper right-hand corner of the page at anytime. Click on "Manage Subscriptions" from the menu on the left of the account page. Once on the subscriptions page, you can select "Edit" to make the necessary changes for your next order. Select "Change Product Quantity" to add to your existing subscription.